.\"	$OpenBSD: tvtohz.9,v 1.9 2015/06/11 16:04:55 mikeb Exp $
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.\" Copyright (c) 1999 Marc Espie
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.Dd $Mdocdate: June 11 2015 $
.Dt TVTOHZ 9
.Os
.Sh NAME
.Nm tvtohz ,
.Nm tstohz
.Nd translate time period to timeout delay
.Sh SYNOPSIS
.In sys/types.h
.In sys/time.h
.In sys/systm.h
.Ft int
.Fn tvtohz "const struct timeval *tv"
.Ft int
.Fn tstohz "const struct timespec *ts"
.Sh DESCRIPTION
The
.Fn tvtohz
and
.Fn tstohz
functions compute the number of
.Va hz
in the specified amount of time.
They are mainly used to translate a timeval or timespec,
respectively,
into a suitable argument for
.Xr timeout 9 .
.Sh CODE REFERENCES
These functions are implemented in the file
.Pa sys/kern/kern_clock.c .
.Sh SEE ALSO
.Xr hz 9 ,
.Xr timeout 9
